/*
* MIT License
*
* Copyright (c) 2020 International Business Machines
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/

#include "HelibContext.h"

using namespace std;
using namespace helib;

HelibContext::HelibContext() { }
  
HelibContext::~HelibContext() { }

int HelibContext::getTopChainIndex() const {
  throw runtime_error("not implemented");
}

void HelibContext::save(std::ostream&out,bool withSecretKey) {
  config.save(out);
  out.write((char*)&withSecretKey,sizeof(withSecretKey));
  writeContextBaseBinary(out,*context);
  writeContextBinary(out,*context);
  if (withSecretKey)
    writeSecKeyBinary(out,*secretKey);
  else
    writePubKeyBinary(out,*publicKey);
}


void HelibContext::load(std::istream&in) {
  if (context!=NULL)
    throw runtime_error("This context is already initialized");
  config.load(in);
  bool withSecretKey;
  in.read((char*)&withSecretKey,sizeof(withSecretKey));
  context=buildContextFromBinary(in).release();
  readContextBinary(in,*context);

  if (withSecretKey) {
    secretKey=new SecKey(*context);
    readSecKeyBinary(in, *secretKey);
    publicKey=(helib::PubKey*) secretKey;
  } else {
    publicKey=new PubKey(*context);
    readPubKeyBinary(in, *publicKey);
    secretKey=NULL;
  }
}


bool HelibContext::hasSecretKey() const {
  return secretKey!=NULL;
}
